Local alternating magnetic field generating device of time division multiplexing system

Abstract

The invention provides a local alternating magnetic field generating device of a time division multiplexing system. The local alternating magnetic field generating device comprises a magnetic field frequency power control unit, an orthogonal magnetic field transmitting antenna group, a driving signal generating circuit, a driving signal switching circuit group and a driving current monitoring circuit. Each single-axis magnetic field transmitting antenna of the orthogonal magnetic field transmitting antenna group is controlled by the driving signal switching circuit group to be excited by the voltage of the driving signal generating circuit in sequence, and the generated magnetic field forms a time-varying local alternating magnetic field in the space. The frequency and intensity of the magnetic field can be adjusted under the control of a control signal of the magnetic field frequency power control unit. The frequency of the generated composite magnetic field is accurate and stable; and the requirement of positioning and tracking data output rate can be met, and rapid positioning and tracking are realized.

Description

technical field [0001] The invention relates to the field of electromagnetic technology, in particular to a local alternating magnetic field generating device of a time-division multiplexing system. Background technique [0002] With the rapid development of medical technology, the digital surgical navigation system has become an important auxiliary equipment for minimally invasive interventional procedures such as spine, brain, and neurosurgery. The digital surgical navigation system provides intelligent real-time tracking and navigation for minimally invasive interventional surgery, enabling uninterrupted two-way information exchange between medical devices and medical workers, making high-risk operations safer, more accurate and more reliable. [0003] In the clinical application of minimally invasive interventional therapy, medical devices (such as electrophysiological catheters, special catheters, guide wires, puncture tools, etc.) can reach the lesion site for diagnosi...

AI Technical Summary

Problems solved by technology

Since the volume of the magnetic marker is spatially limited by the internal space of the medical device, the strength of the magnetic field signal generated by the positioning marker is limited. When the distance between the medical device and the sensor is long, the magnetic sensor cannot distinguish the weak signal and the positioning fails.

At present, there is still a big gap between the measurement accuracy and detection distance of the permanent magnet marker positioning and tracking method and its practicability

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